<html xmlns:th="http://www.thymeleaf.org">
<body>
<h2>Hello World!</h2>
<!--<a href="${flowExecutionUrl}">Start</a>- -->
<!--<input type="submit" name="_eventId_success" value="Proceed" />-->
<!--<input type="submit" name="_eventId_failure" value="Cancel" />-->

<form method="post" th:action="${flowExecutionUrl}">

    <input type="hidden" name="_eventId" value="activate">
    <input type="submit" value="Proceed" />

</form>

<form method="post" th:action="${flowExecutionUrl}">

    <input type="hidden" name="_eventId" value="cancel">
    <input type="submit" value="Cancel" />

</form>

</body>
</html>
